Question about 1992 Chevrolet S-10
My 92 Chevy S10 with a 4.3 liter loses power randomly. I checked the codes and found the map sensor, I replaced that but nothing changed. I noticed that during the power loss the passenger side injector wasn't spraying. I checked the wire from the injector to the computer for continuity and that was fine. I changed the computer but retained the prom and the cal chips, still the same problem. I know the injector is good because I swapped wires from one side to the other and that injector works fine. any ideas would be great. This one has me stumped. Thank you.
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Posted on Jan 02, 2017
Check the injector for 12v on one wire. if good check the other wire for a ground witth the key on. The ground wire pulses from the ECM If you dont have 12v from one wire to the other but you have 12v from one wire to battery ground then be sure the ground wire is good to the computer. If you don't have 12 v at any time check for open hot wire or bad fuse. ADD 12v to the hot wire at the injector. DO NOT add to the wrong wire or you will fry the computer
Posted on Jul 15, 2009
That eliminates the crankshaft and camshaft position sensors. Have you checked the fuel injector itself for an open winding or stuck valve plunger? There should not be a steady 12 volts to the injector--if good injector, it would be spraying fuel steadily into the throttle body. But at least the engine should try to run if poorly. Take the injector out, dry it off with air, and intermittently apply 12 volts to one terminal while grounding the other. You should hear a click from inside every time you touch 12 volts. If not, replace it. If it does, it may be plugged with debris. Try blowing through it in reverse with compressed air.
Posted on Jul 17, 2009
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